I too have much info about Carl David Abraham and all their children. My great grandmothe,Augusta (Ramm) was daughter of Ferdinand Rudolph Abraham...Carl and Caroline's daughter. I have 4 pages of descendants that was compiled by Arthur A. Maina in 1929...on the cover is a photo of Carl David and Caroline.
My paternal grandmother was the oldest child of 10 born to Augusta and Edward Ramm. My grandparents were Clara and Emil Hackbarth of Chicago, Ill. Will be happy to share info. Joan (Hackbarth) Cooke....email@example.com